The Double Variable

The double variable can hold very large (or small) numbers. The maximum and
minimum values are 17 followed by 307 zeros.

The double variable is also used to hold floating point values. A floating
point value is one like 8.7, 12.5, 10.1. In other words, it has a "point
something" at the end. If you try to store a floating point value in an
int variable, NetBeans will underline the faulty code. If you try to run the
programme, the compiler will throw up an error message.